5: Maintenance 600H, 700, 750, 750H, 750HH, 825, 900, 900H, 1050 T3 CAT User Manual
02250197-981 R01
60 Subject to EAR, ECCN EAR99 and related export control restrictions.
5.11.4 Main fluid filter servicing
Refer to Figure 5-3. The main fluid filters are located
schematically in the coolant line between the receiver
tank and
the compressor unit. The main filter elements
are replaceable. For installation of the filter elements, fol-
low the procedure explained below:
1. The compressor MUST be shut of
f and sys-
tem pressure MUST be relieved.
2. Position a suitable container beneath the
elements to catch fluid drainage.
3. Remove elements using a suitable tool.
4. Rotate each element counterclockwise to
remove.
5. Remove element and discard. These ele-
ments are not cleanable.
6. Make certain that the mounting surfaces and
filter heads are clean.
7. Apply a light film of clean fluid to each ele-
ment gasket surface.
8. Center the new elements on filter housing
heads and tighten until the filter gaskets
make contact with the filter housing. After
gaskets make contact, tighten 1/2 to 2/3 of a
turn.
9. Run compressor and check for leaks.
5.11.5 Air filter maintenance
Refer to Figure 5-4. Air filter maintenance should be per-
formed when indicated on instrument panel. The air fil-
ters are both equipped with a primary element and
secondar
y element each.
The secondary element must be replaced after every
third primary ele
ment change. DO NOT reconnect the
secondary element once it is removed.
5.11.5.1 Element removal
1. Clean the exterior of the air filter housing.
2. Remove the cover/element assembly by
loosening the wingnut securing the cover/
element assembly.
3. Remove the cover/element assembly from
the housing by unscrewing the wingnut.
4. Clean the interior of the housing by using a
damp cloth. DO NOT blow out dirt with com-
pressed air as this may introduce dust down-
stream of the filter.
5. When it becomes necessary to remove the
secondary element, pull the element out of
the housing.
6. Install the new secondary element over the
rod.
7. With the secondary element in place, replace
the primary element.
5.11.5.2 Element inspection
1. Place a bright light inside the element to
inspect for damage or leak holes. Concen-
trated light will shine through the element
and disclose any holes.
2. Inspect all gaskets and gasket contact sur-
faces of the housing. Should faulty gaskets
be evident, correct the condition immedi-
ately.
3. If the clean element is to be stored for later
use, it must be stored in a clean container.
4. After the element has been installed, inspect
and tighten all air inlet connections prior to
resuming operation.
5.11.5.3 Primary element replacement
1. Place the element in position over the sec-
ondary element.
2. Install the cover with clean-out port pointing
down. Clamp in place using all latches
located on canister.
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